Re: [PATCH] x86_64: Make NR_IRQS configurable in Kconfig
From: Paul Mackerras
Date: Tue Aug 08 2006 - 01:08:02 EST
Andrew Morton writes:
> > Drawback would be some more TLB misses.
> yup. On some (important) architectures - I'm not sure which architectures
> do the bigpage-for-kernel trick.
I looked at optimizing the per-cpu data accessors on PowerPC and only
ever saw fractions of a percent change in overall performance, which
says to me that we don't actually use per-cpu data all that much. So
unless you make per-cpu data really really slow, I doubt that we'll
see any significant performance difference.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/